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  1. #1

    Question 1997 Seadoo Challenger 1800 - No spark on either motor????

    I have a 1997 Seadoo Challenger 1800 with twin 787 motors and neither one has spark! Where do I start to diag this problem?

    Any help would be much appreciated!


  2. #2
    Kidd800XP's Avatar
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    Any luck with this. I have a 98 with the same problem. New mpem and still same problem.

  3. #3
    does this boat have a DESS Lanyard?? Or a safety tether??

    It would have to be something that both motors have in common..

    Two different motors, two different ign systems - one shut down circuit..

  4. #4
    speedskixp's Avatar
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    These motors are very sensitive to voltage drop. Make sure to check battery voltage and load test. Every 787 I've had would loose spark if the voltage was low even though they would turn over.

  5. #5
    policano's Avatar
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    May 2012
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    I also agree with voltage. Good friend if mine went back and forth troubleshooting and it was battery related. He also cleaned the battery terminals.

  6. #6
    This is how I run a jetski shop in the desert nmpeter's Avatar
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    check spark with plugs pulled. Check electric box connection. Pray it is .t the mpem as they are no longer available and used one command big bucks. Check mpem fuses . Check for chewage or rat signs in the bilge.

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